Size 5 silicone stopper
The size of the stoppers and plugs is defined when you measure the opening of the container, as well as the length of the neck. The plugs can be used to seal openings on normal types of bottles that have the same size opening at the top and the bottom, as well as tampered containers that will have a smaller or larger opening at the top, and the opposite on the bottom. The size 5 silicone stopper is a pretty commonly used unit and the exact dimensions that this unit comes with are 27 millimeters of the top opening, 20 millimeters on the bottom, and the length of the neck is about 25.5 millimeters. Note that depending on the exact type of size 5 silicone stopper these measurements may vary for a millimeter or two, so if you are interested in ordering this plug, you should reach out to us so we can talk about the exact dimensions that we offer and things we can do for you to customize your order.
The size 5 silicone stopper is an extremely practical and long-lasting option since the plug can be sterilized and cleaned for reuse and it will not get damaged when it comes in contact with most chemicals, heat, light, and even dirt, dust, and debris. These units can be used in pretty much every industry, and they are the best solution when it comes to providing a tight seal that will not break with uses or depending on the external conditions. Note that the size of the plug is the most important thing you should consider, so if you are not sure if these are the right dimensions for your container, you can either take test stoppers and see if they work, or you can reach out to us and we can aid in choosing the best model and the best size for your needs.
Stopper & Plug Size Catalog
Compare four stopper profiles and check the selected part dimensions against your opening and available depth. Each profile has its own drawing and dimension meanings.
Custom colors are available to your Pantone color code. Include the code in your inquiry.
RST T-Shaped Plugs
Match stem diameter A, flange diameter B, stem length C and flange thickness D. E refers to the underside recess; use the selected row and approved drawing to confirm the actual profile.

RSA Tapered Corks
Compare large-end diameter A, small-end diameter B and Height, in mm. The mating bore and required seating depth determine where the taper contacts the opening.

RSB Undercut Plugs
Compare neck diameter A, flange diameter B, flange-to-lip distance C and flange thickness D. Check panel thickness and rear clearance. E refers to the underside recess.

RSD T-Shaped Stoppers
Compare stem diameter A, flange diameter B, stem length C and head thickness D, in mm. Check the seating surface and available depth as well as the hole diameter.

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.
Discuss Your RequirementsProduct specifications
- Product form
- Removable closure fitted inside an opening
- Material
- Silicone. Specify the compound grade for the selected service.
- Application focus
- Bottle necks. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to bottle necks.
- Size designation
- Designation 5. Match it to the specific top diameter, bottom diameter and height on the supplier drawing.
- Size selection
- Choose the drawing or chart row by its functional dimensions and units; verify mating-part tolerances before ordering.
- Exposure to evaluate
- Dust or debris. Validate the selected material under the combined conditions.
- Cleaning and reuse
- Specify the cleaning or sterilization cycle discussed for the application, including temperature, duration and permitted reuse.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
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